The MBT-70 (German: KPz 70 or KpfPz 70) was an American–West German joint project to develop a new main battle tank during the 1960s.
The MBT-70 was developed by the United States and West Germany in the context of the Cold War, intended to counter the new generation of tanks developed by the Soviet Union for the Warsaw Pact. The new tank was to be equipped with a number of advanced features such as newly developed “kneeling” hydropneumatic suspension and housing the entire crew in the large turret, and was armed with a 152mm XM150 gun/launcher, which could use both conventional ammunition and the Shillelagh missile for long range combat.
By the late 1960s, the development of the MBT-70 was well over budget and affected by design issues. West Germany withdrew from the project due to costs and new difference in requirements. The United States continued development of the MBT-70 (spun off as the XM803) until 1971 when the program was finally cancelled, with funds and technology from the MBT-70 project redirected to the development of the M1 Abrams. West Germany independently developed the Leopard 2 as its new main battle tank.